Hinterland is the area under the influence of a particular human settlement. The word comes from a German word meaning 'land behind' a city, a port, or similar. Its use in English was first documente
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a26d01533f7b7f96374e86a234346a42d6bf3fcd3eab1075ab9df2ed130d6da. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf60b2ec-0ebc-4c01-9d4e-4e6e1661e712.json and https://artists.proofprofile.net/proofs/artist/bf60b2ec-0ebc-4c01-9d4e-4e6e1661e712.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).